package com.htdz.util;

import org.apache.commons.beanutils.BeanUtils;

import java.beans.BeanInfo;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;

/**
 */
public class BeanUtil {
    /** Map --> Bean 2: 利用org.apache.commons.beanutils 工具类实现 Map --> Bean */
    public static void transMap2Bean2(Map<String, Object> map, Object obj) {
        if (map == null || obj == null) {
            return;
        }
        try {
            BeanUtils.populate(obj, map);
        } catch (Exception e) {
            System.out.println("transMap2Bean2 Error " + e);
        }
    }

    /** Map --> Bean 1: 利用Introspector,PropertyDescriptor实现 Map --> Bean */
    public static void transMap2Bean(Map<String, Object> map, Object obj) {

        try {
            BeanInfo beanInfo = Introspector.getBeanInfo(obj.getClass());
            PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();

            for (PropertyDescriptor property : propertyDescriptors) {
                String key = property.getName();

                if (map.containsKey(key)) {
                    Object value = map.get(key);
                    // 得到property对应的setter方法
                    Method setter = property.getWriteMethod();
                    setter.invoke(obj, value);
                }

            }

        } catch (Exception e) {
            System.out.println("transMap2Bean Error " + e);
        }

        return;

    }

    /** Bean --> Map 1: 利用Introspector和PropertyDescriptor 将Bean --> Map */
    public static Map<String, Object> transBean2Map(Object obj) {

        if (obj == null) {
            return null;
        }
        Map<String, Object> map = new HashMap<String, Object>();
        try {
            BeanInfo beanInfo = Introspector.getBeanInfo(obj.getClass());
            PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();
            for (PropertyDescriptor property : propertyDescriptors) {
                String key = property.getName();

                // 过滤class属性
                if (!"class".equals(key)) {
                    // 得到property对应的getter方法
                    Method getter = property.getReadMethod();
                    Object value = getter.invoke(obj);
                    if (value != null)
                    {
                        map.put(key, value);
                    }
                }

            }
        } catch (Exception e) {
            System.out.println("transBean2Map Error " + e);
        }

        return map;

    }

    public static Map<String, Object> transBean2MapWithNull(Object obj) {
        if (obj == null) {
            return null;
        } else {
            HashMap map = new HashMap();

            try {
                BeanInfo beanInfo = Introspector.getBeanInfo(obj.getClass());
                PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();
                PropertyDescriptor[] var4 = propertyDescriptors;
                int var5 = propertyDescriptors.length;

                for (int var6 = 0; var6 < var5; ++var6) {
                    PropertyDescriptor property = var4[var6];
                    String key = property.getName();
                    if (!"class".equals(key)) {
                        Method getter = property.getReadMethod();
                        Object value = getter.invoke(obj);
                        map.put(key, value);
                    }
                }
            } catch (Exception var11) {
                System.out.println("transBean2Map Error " + var11);
            }

            return map;
        }
    }
}
